package com.ywq.wechatordersys.utils;

import org.springframework.util.StringUtils;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class IDUtils {
    private static byte[] lock = new byte[0];  
  
    // 位数，默认是8位  
    private final static long w = 100000000;  
  
    public static String createID() {
        long r = 0;  
        synchronized (lock) {  
            r = (long) ((Math.random() + 1) * w);  
        }
        String s = System.currentTimeMillis() + String.valueOf(r).substring(1);
        return s;
    }  
}  